Russian curler Alexander Krushelnitckii has been formally charged with doping after testing positive for meldonium. His first sample had tested positive for the substance, which was banned by the World Anti-Doping Agency in 2016. His B-sample, which is used to confirm positive tests, was tested on Monday in Korea.

Krushelnitckii was one of 168 Olympic Athletes of Russia allowed to participate in PyeongChang despite the International Olympic Committee’s banning of Russia for a state-sponsored doping program at the Sochi Games in 2014. All athletes were cleared by the IOC and were supposedly clean.